[PATCH 0/4] rbd: fix a deadlock around header_rwsem and lock_rwsem

[Ilya Dryomov <idryomov@xxxxxxxxx>]

Hello,

This fixes a deadlock which can occur when a watch error is hit while
the RBD driver is still recovering from a previous watch error.  This
lock cycle was discovered during some performance tests.

Thanks,

                Ilya


Ilya Dryomov (4):
  rbd: move rbd_dev_refresh() definition
  rbd: decouple header read-in from updating rbd_dev->header
  rbd: decouple parent info read-in from updating rbd_dev
  rbd: take header_rwsem in rbd_dev_refresh() only when updating

 drivers/block/rbd.c | 412 ++++++++++++++++++++++++--------------------
 1 file changed, 225 insertions(+), 187 deletions(-)

-- 
2.41.0